Conchoraptor
Conchoraptor | ||||||||||||
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Conchoraptor gracilis , graphic head study |
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Temporal occurrence | ||||||||||||
Upper Crayon (middle Campanium ) | ||||||||||||
80.6 to 76.4 million years | ||||||||||||
Locations | ||||||||||||
Systematics | ||||||||||||
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Scientific name | ||||||||||||
Conchoraptor | ||||||||||||
Barsbold , 1986 | ||||||||||||
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Conchoraptor is a theropod dinosaur from the group of oviraptorosauria from the Upper Cretaceous of Mongolia . The only kind ( type species ) of this genus is Conchoraptor gracilis .
Within the Oviraptorosauria, Conchoraptor is classified as Oviraptoridae . Numerous finds of this genus are known, which make it one of the most complete surviving oviraptorids. Like other Oviraptorosauria, the Conchoraptor was a two-legged , presumably feathered animal with a toothless beak and presumably a herbivorous or omnivorous diet.
Find and naming
The holotype material (catalog number IGM 100/20), on the basis of which Conchoraptor was described, was discovered in 1971 in the Red Beds of Khermeen Tsav, in Ömnö-Gobi-Aimag , an aimag in Mongolia . The find is a partial skeleton with a 99 mm long skull. Stratigraphically , Khermeen Tsav belongs to the Barun-Goyot Formation and is dated to the Upper Cretaceous (middle Campanium ).
Initially, the fossil was ascribed to Oviraptor , but it was not until 1986 that Rinchen Barsbold established the new genus Conchoraptor based on this fossil . Since the first description, four more partially skulls and numerous other skull and postcranial material have been assigned to Conchoraptor .
The name Conchoraptor is derived from the ancient Greek kogkhe - "shellfish, mussel" and the Latin raptor "robber" and refers to the assumption of Barsbold that the animal could have fed on mollusks .
features
Conchoraptor was about 1.3 meters long and was thus similar in size to Ajancingenia , which comes from the same rock layers. Unlike Ajancingenia's , however, Conchoraptor's skeleton was slimmer. Conchoraptor lacked the head crest found in some other Oviraptorosauria - so the top of the lacrimal bone (lacrimale) was almost horizontal. The hand was thin and had thin, slightly curved claws. The sacrum was long and contained 7 to 8 vertebrae with long and thin vertebral centers. The long and thin ilium was similar to that of Ingenia .
Web links
Individual evidence
- ^ Gregory S. Paul : The Princeton Field Guide To Dinosaurs. Princeton University Press, Princeton NJ et al. 2010, ISBN 978-0-691-13720-9 , p. 69, online .
- ↑ a b c Halszka Osmólska , Philip J. Currie , Rinchen Barsbold : Oviraptorosauria. In: David B. Weishampel , Peter Dodson , Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 165-183.
- ↑ Michael Mortimer: Oviraptorosauria. In: The Theropod Database. Archived from the original on January 29, 2013 ; Retrieved July 30, 2014 .
- ↑ Ben Creisler: Dinosauria Translation and Pronunciation Guide. Archived from the original on July 20, 2011 ; Retrieved July 30, 2014 .
- ↑ Rinchen Barsbold: Oviraptorosauria. In: Philip J. Currie, Kevin Padian (Eds.): Encyclopedia of Dinosaurs. Academic Press, San Diego CA et al. 1997, ISBN 0-12-226810-5 , p. 506.